This drawing compares the Earth to the star, 40 Eridani B. Eridani B is a white dwarf and part of a triple star system. The system is about 16 light years from Earth in the constellation, Eridanus, "The River". It is very heavy for its size. 40 Eridani B is half the mass of the Sun but is only about twice as big as Earth. Windows to the Universe original image